1.There is no game
There is no game !? or is there ? That's all the information you get. This is simple yet a masterpiece. (Hint - Start by Taping on the screen ;) )

 Size - 24 MB
Offine.
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 2. Yellow
Make the screen yellow! that;s it. There are 50 levels, dare to complete them all ?
Try you'r best because its gonna take a while ;)

 Size - 24 MB
Offline.
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3.Think
A minimalistic, beautifully designed visual puzzle game. With over 360 puzzles spread over 30 chapters, this game is sure to pull you in. The game shows a set of images and we have to guess the phrase or sentence it represents.

 Size - 21 MB
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 4.Tricky Test 2: Genius Brain?
Tricky Test 2 is a whole new free puzzle game with a series of tricky brain teasers and absurd solutions that you will never ever think of. 
  Features:
- "100+ Tricky & Mind-blowing Brain Teasers″ - new questions added regularly!
- "Test Your Friends Mode" - select hardest questions to test your friends’ IQ!
- "Tap, Shake or Kiss your Phone?″ - Nothing’s impossible, brain it on!
Size - 29 MB
Offline
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5. Skillz - Logical Brain
Want to test your memory skills or give your brain an exercise? Try this fun memory game to improve your memory, speed, get better accuracy, distinguish between colors and much more. This is a fun logical game that gives a good test to your brain.
App highlights -
✓Improve your memory
✓Train your reflexes
✓Increase your accuracy
✓Prove your touch ability
✓Increase your speed
✓Learn color coordination

 Size - 20 MB
Offline.
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Have you tried these games ? Which one is your favourite ? Lemme know!
If you guys want me write about any other "Top 5 's" let me know down in the comment section! :)